<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-btn" @click="toggleCollapse">|||</div>
        <!-- 侧边栏内容区域 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" :unique-opened="true"
          :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单内容 -->
            <template slot="title">
              <!-- 一级菜单图标 -->
              <i :class="iconlist[item.id]"></i>
              <!-- 一级菜单标题 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + item.path" v-for="item in item.children" :key="item.id"
              @click="saveNavState('/' + item.path)">
              <!-- 二级菜单内容 -->
              <template slot="title">
                <!-- 二级菜单图标 -->
                <i class="el-icon-menu"></i>
                <!-- 二级菜单标题 -->
                <span>{{ item.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    data() {
      return {
        menulist: [],
        iconlist: {
          '125': 'iconfont icon-users',
          '103': 'iconfont icon-tijikongjian',
          '101': 'iconfont icon-shangpin',
          '102': 'iconfont icon-danju',
          '145': 'iconfont icon-baobiao'
        },
        // 默认不折叠
        isCollapse: false,
        activePath: ''
      }
    },
    created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
      logout() {
        window.sessionStorage.clear()
        this.$router.push('/login')
      },
      //获取所有的菜单
      async getMenuList() {
        const { data: res } = await this.$http.get('menus')
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menulist = res.data
      },
      //点击按钮实现菜单的折叠展开
      toggleCollapse() {
        this.isCollapse = !this.isCollapse
      },
      saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath)
        this.activePath = activePath
      }
    }
  }
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373d41;
    padding-left: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
    font-size: 20px;

    >div {
      display: flex;
      align-items: center;
    }

    span {
      margin-left: 15px;
    }
  }

  .el-aside {
    background-color: #333744;
  }

  .el-menu {
    border-right: none;
  }

  .toggle-btn {
    color: #fff;
    line-height: 24px;
    font-size: 10px;
    background-color: #4a5064;
    text-align: center;
    letter-spacing: 0.2em;
  }


  .el-main {
    background-color: #eaedf1;
  }

  .iconfont {
    margin-right: 10px;
  }
</style>